Re: Question

"of authors" refers to the fact that more than one author (of a paper, rather than a species) has mentioned Coenosia sexnotata Meigen, but they were actually looking at a different species, not the same as Meigen's sexnotata. But I'm not sure how the "Bezzi (1891)" relates to this. Can you tell us the context/reference?

Re: Question

I think the answer lies if we go back to Bezzi's 1891 paper on Italian Diptera. In that, he lists the flies that have been recorded from Italy and gives the references from which he has derived the records. Coenosia campestris Desvoidy is not mentioned, but Coenosia sexnotata Meigen is. Somehow your reference has concluded that instead of Meigen's sexnotata, the authors that Bezzi cites were looking at campestris Desvoidy. So in this case, sexnotata (as mis-interpreted by those authors) is a synonym of campestris, whereas Meigen's original sexnotata is not. In your second case, Hebecnema affinis Malloch is a straightforward synonym of vespertina Fallén - there is no mis-interpretation by authors involved. Does that help?

Re: Question

The authors Bezzi mentions are Pokorny (without a specific reference, but only two are listed in the Bibliography) and Rondani (two references, listed in his bibliography on pp.27-31). In the days of typesetting by hand, everything is abbreviated to near oblivion!